yeah, someone doesnt know what they are talking about... I have a mag, fire TV, fire TV stick, MXC, M8.. yes some with more preocessor/ram have a mildly snappier experience in the GUI (so far from noticable i almost dont want to mention it). but they can all handle the stalker plugins jsut fine, video streams are not a processor/ram intensive process.
At the end of the day, the fire TV stick works great for iptv stalker as well as genesis, really the only 2 plugins i use. If all you need is a device with HDMI output then the fire tv stick is really all you need.. I will add I only run the English EPG grab and kodi in the menu idle has about 150 megs of ram free.. the full grab may eat a bit more ram but not by much..
If you are in Canada though and are stuck buying your fire TV sticks on fleabay, i would suggest the M8, it has double the specs and after price with shipping they are about the same.. ( a fire tv stick costs about 65 CDN after shipping on ebay)